#include<stdio.h>
#define SUM 100000
int main()
{
 	float amount,aver,total;
 	int i;
 	for(i=1,total=0;i<1000;i++)
 	{
 		printf("please enter amount:");
 		scanf("%f",&amount);
 		total+=amount;
 		if(total>=SUM) break;
	}
	aver=total/i;
	printf("num=%d\naver=%10.2f\n",i,aver);
 	return 0;
}

